General Purpose Input Outpus (GPIO) lines are used on STK1000 to connect to LED's and switches and for general usage.
GPIO signals on STK1000 are mapped to the following ports on AP7200. The third column list which switch to select in order to connect the AP7200 ports to the STK1000 GPIO signals.
Note that several IO lines are used for peripherals on the STK1000 and may have pull-up or pull-down connected.
STK1000 GPIO signals | AP7200 ports | Selected by switch |
---|---|---|
GPIO0 | PC0 | SW5 |
GPIO1 | PC1 | SW5 |
GPIO2 | PC2 | SW5 |
GPIO3 | PC3 | SW5 |
GPIO4 | PC4 | SW5 |
GPIO5 | PC5 | SW5 |
GPIO6 | PC6 | SW7 |
GPIO7 | PC7 | SW7 |
GPIO8 | PC8 | SW7 |
GPIO9 | PC9 | SW7 |
GPIO10 | PA28 | (direct) |
GPIO11 | PA29 | (direct) |
GPIO12 | PA30 | SW5 |
GPIO13 | PA31 | SW5 |
GPIO14 | PB14 | SW10 |
GPIO15 | PB15 | SW10 |
GPIO16 | PC10 | SW3 |
GPIO17 | PC11 | SW3 |
GPIO18 | PC12 | SW3 |
GPIO19 | PC13 | SW3 |
GPIO20 | PC14 | SW3 |
GPIO21 | PC15 | SW3 |
GPIO22 | PC16 | SW3 |
GPIO23 | PC17 | SW3 |
GPIO24 | PA20 | (direct) |
GPIO25 | not connected | |
GPIO26 | PA21 | shared with Nexus |
GPIO27 | PA22 | shared with Nexus |
GPIO28 | PA23 | shared with Nexus |
GPIO29 | PA8 | SW7 |
GPIO30 | PA6 | SW3 |
GPIO31 | PA7 | SW3 |